B&R X20PS9402 X20 Power Supply Module

Product Overview

The X20PS9402 (X20PS9402) is a dedicated 24 VDC power supply module engineered for the B&R X20 System architecture. This module provides stable power distribution for the bus controller, the X2X Link network, and the connected I/O slice stack. Designed for high-reliability industrial environments—such as assembly line controllers, conveyor tracking systems, and distributed I/O islands—it ensures a steady operational voltage even when the primary supply fluctuates. By consolidating power management for the I/O backplane and communication bus, the X20PS9402 reduces cabinet complexity and ensures consistent signal integrity for high-speed automated processes.

Technical Configuration

This module is built for efficiency and robust protection, serving as the power backbone for localized X20 I/O stations.

• Integrated Power Distribution: Manages the power requirements for the bus controller, X2X Link, and the internal I/O electronics within a single compact module.

• Protection Features: Outfitted with an integrated, non-replaceable fuse and reverse polarity protection, the module is safeguarded against common installation errors and transient power faults.

• Performance: Maintains stable output within an input voltage range of 24 VDC -15% / +20%, effectively buffering against localized voltage drops or surges in the factory power grid.

• Diagnostic Compatibility: Designed for seamless integration with X20 system diagnostics, allowing the master controller to monitor supply status and prevent system-wide shutdowns due to localized power failures.

Technical Specifications

Industrial Hardware FAQs

Does the integrated fuse require replacement after a fault?

No. The integrated fuse in the X20PS9402 is designed for automatic recovery or localized protection and cannot be replaced. If the fuse has permanently tripped, the module has sustained a significant internal fault or prolonged overcurrent, necessitating the replacement of the entire unit to restore system safety.

How is reverse polarity protection implemented?

The module features internal circuitry that prevents current flow if the 24 VDC input lines are connected in reverse. This protects the sensitive internal components and backplane electronics from immediate damage during the initial commissioning phase.

Can I power high-current output modules directly from this supply?

While the X20PS9402 handles the internal I/O and communication bus power, verify that your total load—including high-current output modules—does not exceed the power budget of your entire X20 node configuration. Always refer to the B&R power supply calculator for your specific rack assembly to ensure load balancing.

Field Commissioning and Safety Guidelines

Input Voltage Stability

The module supports an input range of 20.4 VDC to 28.8 VDC. Ensure that your power supply rail is stabilized and not shared with high-inductive loads such as large contactors or motor starters, which can introduce voltage spikes that approach the upper limit of the module's rating.

Installation and Backplane Seating

Always install the module on a grounded DIN rail to ensure the internal shielding functions correctly. When clicking the module onto the bus base, ensure a firm, even pressure is applied. If the module is loose, the power contacts may exhibit high resistance, leading to intermittent voltage drops or unexpected system resets.

Cable Termination

Use proper ferrules for all 24 VDC input wiring. Given the 0.7 A current draw, standard wire gauges (such as 0.75 mm2 or 1.0 mm2) are typically sufficient, provided they are rated for the environment. Ensure terminal screws are torqued to factory specifications to prevent contact heating over time.